List of power stations in Washington


This is a list of electricity-generating power stations in the U.S. state of Washington, sorted by type and name. These include facilities that are located in more than one state. In 2023, Washington had a total summer capacity of 30,884 MW through all of its power plants, and a net generation of 102,960 GWh. The electrical energy generation mix in 2024 was 59.6% hydroelectric, 17.7% natural gas, 9.8% nuclear, 8.3% wind, 2.8% coal, 1.1% biomass which includes most refuse-derived fuel. Utility-scale solar and other gases generated most of the remaining 0.7%. Small-scale photovoltaic installations generated an additional net 643 GWh to the state's electrical grid; an amount nearly 50 percent larger than Washington's utility-scale photovoltaic plants.
Washington routinely delivers one-quarter of U.S. hydroelectric generation, and hosts the nation's largest capacity power station at Grand Coulee Dam. 60% of Washington households use electricity as their primary heating fuel, unlike most households in other U.S. states that typically utilize natural gas.

Fossil-fuel power stations

Data from the U.S. Energy Information Administration serves as a general reference.

Renewable power stations

Data from the U.S. Energy Information Administration serves as a general reference.

Hydroelectric

NameLocationCoordinatesRiverCapacity
OperatorYear opened
Alder DamPierce CountyNisqually River50Tacoma Power1945
Bonneville DamSkamania County
Multnomah County, Oregon		Columbia River1,093United States Army Corps of Engineers1938, 1981
Boundary DamMetaline Falls, WashingtonPend Oreille River1,024Seattle City Light1967
Box Canyon DamIone, WashingtonPend Oreille River90Pend Oreille PUD1955
Cedar Falls DamCedar Falls, WashingtonCedar River30Seattle City Light1921, 1929
Chief Joseph DamDouglas County
Okanogan County		Columbia River2,620United States Army Corps of Engineers1958, 1973
Cowlitz Falls DamLewis CountyCowlitz River70Lewis County Public Utilities District1994
Cushman Dam No. 1Mason CountySkokomish River43Tacoma Power1926
Cushman Dam No. 2Mason CountySkokomish River81Tacoma Power1930–1931,
1952, 2013
Diablo DamWhatcom CountySkagit River159Seattle City Light1936–1937
Electron Hydroelectric ProjectPierce CountyPuyallup River26Electron Hydro, LLC.1904, 1929
Gorge DamWhatcom CountySkagit River199Seattle City Light1924, 1929,
1951
Grand Coulee DamGrant County
Okanogan County		Columbia River6,809United States Bureau of Reclamation1941, 1975
Henry M. Jackson DamSnohomish CountySultan River112Snohomish County Public Utility District1984
Ice Harbor DamFranklin County
Walla Walla County		Snake River603United States Army Corps of Engineers1962,
1975–1976
Lake Chelan DamChelan, WashingtonChelan River62.1Chelan County Public Utility District1927–1928
LaGrande DamPierce CountyNisqually River64Tacoma Power1912, 1945
Little Goose DamColumbia County
Whitman County		Snake River932United States Army Corps of Engineers1970–1971,
1978
Long Lake DamLincoln CountySpokane River71Avista Utilities1915, 1919,
1924
Lower Baker DamSkagit CountyBaker River79Puget Sound Energy1960, 2013
Lower Granite DamGarfield County
Whitman County		Snake River932United States Army Corps of Engineers1975, 1978
Lower Monumental DamFranklin County
Walla Walla County		Snake River932United States Army Corps of Engineers1969–1970,
1979
Mayfield DamLewis CountyCowlitz River162Tacoma Power1963, 1983
Merwin DamClark County
Cowlitz County		Lewis River136PacifiCorp1931–1932,
1949, 1958
Mossyrock DamLewis CountyCowlitz River300Tacoma Power1968
Priest Rapids DamGrant County
Yakima County		Columbia River955Grant County Public Utility District1959–1961
Rock Island DamChelan County
Douglas County		Columbia River660Chelan County Public Utility District1931–1932,
1952–1953,
1978–1979
Rocky Reach DamChelan County
Douglas County		Columbia River1,300Chelan County Public Utility District1961,
1973–1974
Ross DamWhatcom CountySkagit River353Seattle City Light1952–1956
Snoqualmie Falls Hydroelectric PlantSnoqualmie, WashingtonSnoqualmie River54Puget Sound Energy1898, 1957,
2013
Swift DamSkamania County
Lewis River240PacifiCorp1958–1959
Upper Baker DamWhatcom CountyBaker River91Puget Sound Energy1959
Wanapum DamGrant County
Kittitas County		Columbia River1,038Grant County Public Utility District2011–2018
Wells DamChelan County
Douglas County		Columbia River851Douglas County Public Utility District1967–1969
Wynoochee DamGrays Harbor CountyWynoochee River12.8Tacoma Power1994
Yale DamClark County
Cowlitz County		Lewis River134PacifiCorp1953

Wind

NameLocationCoordinatesCapacity
Year opened
Wild Horse Wind FarmKittitas County2732006, 2009
Marengo Wind FarmColumbia County2112007, 2008
White Creek Wind FarmKlickitat County2052007
Big Horn Wind FarmKlickitat County2002006
Big Horn 2Klickitat County502011
Palouse Wind FarmWhitman County1052012
Stateline Wind Farm
Walla Walla County1772001
Hopkins Ridge Wind FarmColumbia County1572005, 2008
Harvest Wind FarmKlickitat County992009
Nine Canyon Wind FarmBenton County992002
Goodnoe Hills Wind FarmKlickitat County942008
Coastal EnergyGrays Harbor County62010
Lower Snake River Wind ProjectGarfield County342.72012
Juniper CanyonKlickitat County151.22011
Kittitas Valley Wind Farm
Kittitas County100.82010
Vantage Wind Power ProjectKittitas County902010
Linden RanchKlickitat County502010
Windy FlatsKlickitat County262.42009
Windy Point
Klickitat County137.62009
Tucannon River Wind FarmDayton, Washington2672014
Swauk Valley Ranch WindKittitas County4.32012
Skookumchuck Wind FarmLewis County
Thurston County		1362020

Solar

Only utility scale projects larger than 1 MW are listed.
NameLocationCoordinatesCapacity
Year opened
Adams Nielson Solar FarmAdams County282018
Camas Solar ProjectKittitas County6.72022
Horn Rapids SolarBenton County42020
Lund Hill Solar ProjectKlickitat County1942022
Penstemon Solar ProjectKittitas County6.72022
Urtica Solar ProjectKittitas County6.72022